Transcript
PCM2R regenerator User’s Guide 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901
PCM2R regenerator G.703 2048 kbit/sec Features
Contents
• G.703 line interface 2048 kbit/sec
Description Technical specifications Delivered items Order code Indicators and controls Front and rear panel connectors Loops
• G.703 receiver sensitivity -43 dB • Regeneration distance up to 2.4 km • Jitter suppression • Capability to enable loops on each direction independently • Built-in overvoltage protection • Bearer loss and BPV error indication • Certificate of the Ministry of Communications of the Russian Federation No. OS/1-SPD-19 SSE (registration number ROSS RU.0001.01ÝÑ00)
1 Copyright © 2000-2005 Cronyx Engineering
1.0E / 08.11.2005
PCM2R REGENERATOR 123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456 123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456
Description The PCM-2R regenerator is designed for increasing the communication range between devices equipped with an interface corresponding to recommendation ITU-T G.703 2048 kbit/sec. The regenerator regenerates the signal weakened by line cable, and suppresses phase jitter. The regenerator may be used to connect two parts of a physical communication line, increasing its overall length.
The capability to enable loops in both directions independently allows testing the joined parts of physical line. The regenerator is designed for installation on heated premises, and receives electric power supply from 220 VAC mains, or from a 60 VDC exchange battery. An example of building a communication link using the regenerator and two PCÌ-2D modems is shown on Fig.1.
Cronyx PCM-2D
Cronyx PCM-2D
Cronyx PCM-2R TP/COAX G.703
TP/COAX G.703 Fig. 1
Technical specifications G.703 interface Connector Encoding Line impedance Signal level at the receiver input Maximum length of the regeneration part Jitter suppression Maximum value of phase jitter Error control Overvoltage protection Diagnostic modes Loops
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DB-15 for twisted pair BNC for coaxial cable HDB3 120 Ohms (balanced twisted pairs) 75 Ohms (coaxial) 0 to -43 dB 2.4 km (for TPP-0.5 cable) In the receiver path, attenuation up to 120 UIpp according to recommendation ITU-T G.823 Encoding violation TVS 10 V - 15 V Local (on the G.703), on both sides independently)
Copyright © 2000-2005 Cronyx Engineering
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Design parameters Size Weight (without power adapter) Power supply Supply voltage Current consumption Operating conditions Environment temperature Relative air humidity Operating mode
140 õ 35 õ 110 not more than 150 g. 220 VAC ± 10% not more than 30 ma +5°C to +50 °C not more than 90% @ +25°C continuous
Order code: PCM2R-AC Power supply (for desktop models only) AC - ~220V DC - =60V
Model
Delivered items: - PCM2R regenerator - power adaptor (220 VAC or 60 VDC) - user’s guide
Indicators and controls S1 DIP switch - enables loop on link 0 when in the ON position. S2 DIP switch - enables loop on link 1 when in the ON position. ER1 indicator - lights during loss of carrier or encoding errors (BPV) in link 1. ER0 indicator - lights during loss of carrier or encoding errors (BPV) in link 0.
RX0
TX0
LINK0
CRONYX PCM2 ER1 ER0 PWR 1 2 ON
Copyright © 2000-2005 Cronyx Engineering
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Front and rear panel connectors 9VDC
RX1
LINK1
TX1
The front panel contains connectors designed for connecting to link 0. The rear panel contains connectors designed for connecting to link 1. TX and RX BNC connectors serve for connecting to a coaxial cable. The DB-15 connector, which pinout is presented in the table, serves for connecting to a telephone line: Pin number 1 3 9 11
Signal XMT-a RCV-b XMT-b RCV-a
Loops Link 0
Link 1 1 2 ON Normal operation
Link 0
Link 1 1 2 ON Loop on link 0
Link 0
Link 1
1 2 ON Loop on link 1
Cronyx Engineering 8
123060 Moscow Russia, Marshala Sokolovskogo St. 4
Phone/Fax: +7 (095) 742-1771 Web: www.cronyx.ru FTP: ftp.cronyx.ru E-mail:
[email protected] Copyright © 2000 Cronyx Engineering
